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Equipment and method for preparing directional magnesium alloy

A technology for magnesium alloys and equipment, which is applied in the field of preparing oriented magnesium alloys, can solve problems such as difficulty in obtaining, inability to prepare castings that meet the requirements, and low efficiency, and achieve the effect of meeting the requirements.

Inactive Publication Date: 2017-06-13
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with other alloy systems, the research on directional solidification of magnesium alloys is still in the exploratory stage, mainly because it is different from most of the alloy systems that have achieved experimental success. Magnesium alloys have a hexagonal close-packed structure. Metals with a body-centered cubic structure are more difficult to achieve a single grain orientation during solidification
At present, there are many methods to prepare oriented magnesium alloys, such as water cooling method, liquid metal cooling method, etc., but these methods have certain problems. Castings for engineering applications, how to prepare engineering oriented magnesium alloy castings is a difficult problem in the field of magnesium alloys

Method used

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  • Equipment and method for preparing directional magnesium alloy

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Experimental program
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Effect test

Embodiment 1

[0031] The casting mold shell is prepared by investment casting process, the mold shell is made of magnesium oxide material, and the binder is prepared by the hydrate formed by the ratio of magnesium chloride and active magnesium oxide powder; magnesium chloride (MgCl 2 6H 2 O) the aqueous solution concentration is 20%, the particle size of magnesium oxide powder is 200 mesh, magnesium chloride (MgCl 2 6H 2O) aqueous solution and active magnesium oxide powder mass ratio is 1:3.5; the thickness of the casting mold shell is 7 layers; the first layer is 80 mesh magnesium oxide powder, the second layer is 60 mesh magnesia sand, and the third layer is 36-mesh magnesia sand, 24-mesh sand for the fourth to seventh layers; the casting formwork is dried in the air, the air humidity is >60%, the drying temperature is 28°C, and the drying time of each layer is controlled within 4 hours; the casting formwork Dewaxing adopts steam dewaxing, the steam temperature is controlled at 180°C, t...

Embodiment 2

[0033] The casting mold shell is prepared by investment casting process, the mold shell is made of magnesium oxide material, and the binder is prepared from the hydrate formed by the ratio of magnesium chloride and active magnesium oxide powder; magnesium chloride (MgCl 2 6H 2 O) concentration of aqueous solution is 10%, the particle size of magnesium oxide powder is 100 mesh, magnesium chloride (MgCl 2 6H 2 O) aqueous solution and active magnesium oxide powder mass ratio is 1:3; the thickness of the casting mold shell is 5 layers; the first layer is 80 mesh magnesium oxide powder, the second layer is 60 mesh magnesia sand, and the third layer is 36-mesh magnesia sand, 24-mesh sand for the fourth-fifth layer; the casting formwork is dried in the air, the air humidity is >60%, the drying temperature is 35°C, and the drying time of each layer is controlled within 2 hours; the casting formwork Dewaxing adopts steam dewaxing, the steam temperature is controlled at 160°C, the pre...

Embodiment 3

[0035] The casting mold shell is prepared by investment casting process, the mold shell is made of magnesium oxide material, and the binder is prepared by the hydrate formed by the ratio of magnesium chloride and active magnesium oxide powder; magnesium chloride (MgCl 2 6H 2 O) concentration of aqueous solution is 15%, the particle size of magnesium oxide powder is 200 mesh, magnesium chloride (MgCl 2 6H 2 O) aqueous solution and active magnesium oxide powder mass ratio is 1:3.2; the thickness of the casting mold shell is 5 layers; the first layer is 80 mesh magnesium oxide powder, the second layer is 60 mesh magnesia sand, and the third layer is 36-mesh magnesia sand, 24-mesh sand for the fourth-fifth layer; the casting formwork is dried in the air, the air humidity is >60%, the drying temperature is 30°C, and the drying time of each layer is controlled within 3 hours; the casting formwork Dewaxing adopts steam dewaxing, the steam temperature is controlled at 170°C, the pre...

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Abstract

The invention discloses equipment for preparing a directional magnesium alloy. The equipment comprises a casting shell, a water cooling disc, a smelting crucible, a heat insulating baffle plate, a crystal selecting filtering net and a withdrawing mechanism. According to the equipment, conventional problems are solved very well; the requirement on a high-performance magnesium alloy casting of the industrial field is met.

Description

technical field [0001] The invention relates to a device and a method for preparing oriented magnesium alloys, belonging to the field of preparing magnesium alloys, in particular to the field of preparing oriented magnesium alloys. Background technique [0002] Magnesium alloy is the lightest structural metal in industrial applications. It has high specific strength and specific stiffness, good thermal conductivity and electrical conductivity, good damping and shock absorption and electromagnetic shielding performance, easy processing and forming, and easy recycling. Advantages, are widely used in the automotive industry, aerospace and 3C industries. In recent years, automobile manufacturers have begun to use magnesium alloy die castings to reduce the weight of automobiles. Although die-cast magnesium alloys are widely used, the mechanical properties of cast products are not ideal. One of the reasons that limit the application of magnesium alloys is that the strength of ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22D27/04B22C1/18B22D43/00
CPCB22C9/04B22C1/18B22D27/045B22D43/004
Inventor 毛萍莉刘正王志王峰
Owner SHENYANG POLYTECHNIC UNIV